The function is very simple, with only input and output, and basically no logic. Single-chip microcomputer module = barcode scanner (the gun is provided by us, and the single-chip microcomputer can su
I am a very boring person with no ambition. I feel sleepy after dinner when I get home. I can barely play online games. I start to get into bed after 11 o'clock and can start dreaming within 3 minutes
[backcolor=rgb(239, 245, 249)][size=4]I would like to ask, why is there a resistor connected to the BC pole of this transistor? The transistor here is a switch tube, not an amplifier. And it is an NPN